//
//  VisitorView.swift
//  SchoolNews
//
//  Created by 徐涵菲 on 2018/4/28.
//  Copyright © 2018年 Wangly. All rights reserved.
//

import UIKit

/// 访客视图
class VisitorView: UIView {
    
    ///注册按钮
    lazy var registerButton:UIButton=UIButton.sn_textButton("注册", fontSize: 16, normalColor: UIColor.orange, highlightedColor: UIColor.black,backgroundImageName: "common_button_white_disable")
    
    ///登录按钮
    lazy var loginButton:UIButton=UIButton.sn_textButton("登录", fontSize: 16, normalColor: UIColor.darkGray, highlightedColor: UIColor.black,backgroundImageName: "common_button_white_disable")
    
    ///访客视图的信息字典[imageName/message]
    ///如果首页 imageName==""
    var visitorInfo:[String:String]?{
        didSet{
            // 1> 取字典信息
            guard let imageName = visitorInfo?["imageName"],
                let message = visitorInfo?["message"] else {
                    
                    return
            }
            
            // 2> 设置消息
            tipLabel.text = message
            
            // 3> 设置图像，首页不需要设置
            if imageName == "" {
                startAnimation()
                
                return
            }
            
            iconView.image = UIImage(named: imageName)
            
            // 其他控制器的访客视图不需要显示小房子/遮罩视图
            houseIconView.isHidden = true
            maskIconView.isHidden = true
            
        }
    }
    
    // MARK: - 构造函数
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    /// 旋转图标动画（首页）
    private func startAnimation() {
        
        let anim = CABasicAnimation(keyPath: "transform.rotation")
        
        anim.toValue = 2 * M_PI
        anim.repeatCount = MAXFLOAT
        anim.duration = 15
        
        // 动画完成不删除，如果 iconView 被释放，动画会一起销毁！
        // 在设置连续播放的动画非常有用！
        anim.isRemovedOnCompletion = false
        
        // 将动画添加到图层
        iconView.layer.add(anim, forKey: nil)
    }
    
    
    // MARK: - 私有控件
    /// 懒加载属性只有调用 UIKit 控件的指定构造函数，其他都需要使用类型
    /// 图像视图
    fileprivate lazy var iconView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_smallicon"))
    
    /// 遮罩图像 - 不要使用 maskView
    fileprivate lazy var maskIconView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_mask_smallicon"))
    
    /// 小房子
    fileprivate lazy var houseIconView: UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_house"))
    
    /// 提示标签
    fileprivate lazy var tipLabel: UILabel = UILabel.sn_label(
        withText: "关注一些人，回这里看看有什么惊喜关注一些人，回这里看看有什么惊喜",fontSize: 14,color: UIColor.darkGray)
    
}

// MARK: - 设置界面
extension VisitorView{
    func setupUI(){
        // 0. 在开发的时候，如果能够使用颜色，就不要使用图像，效率会更高！
        backgroundColor=UIColor.sn_color(withHex: 0xEDEDED)
        // 1. 添加控件
        addSubview(iconView)
        addSubview(maskIconView)
        addSubview(houseIconView)
        addSubview(tipLabel)
        addSubview(registerButton)
        addSubview(loginButton)
        
        // 文本居中
        tipLabel.textAlignment = .center
        
        // 2. 取消 autoresizing
        for v in subviews {
            v.translatesAutoresizingMaskIntoConstraints = false
        }
        
        // 3. 自动布局
        let margin: CGFloat = 20.0
        
        // 1> 图像视图
        addConstraint(NSLayoutConstraint(item: iconView, attribute: .centerX, relatedBy: .equal, toItem: self, attribute: .centerX, multiplier: 1.0, constant: 0))
        addConstraint(NSLayoutConstraint(item: iconView, attribute: .centerY, relatedBy: .equal, toItem: self, attribute: .centerY, multiplier: 1.0, constant: -60))
        
        // 2> 小房子
        addConstraint(NSLayoutConstraint(item: houseIconView,attribute: .centerX,relatedBy: .equal,toItem: iconView,attribute: .centerX,multiplier: 1.0,constant: 0))
        addConstraint(NSLayoutConstraint(item: houseIconView,attribute: .centerY,relatedBy: .equal,toItem: iconView,attribute: .centerY,multiplier: 1.0,constant: 0))
        
        // 3> 提示标签
        addConstraint(NSLayoutConstraint(item: tipLabel,attribute: .centerX,relatedBy: .equal,toItem: iconView,attribute: .centerX,multiplier: 1.0,constant: 0))
        addConstraint(NSLayoutConstraint(item: tipLabel,attribute: .top,relatedBy: .equal,toItem: iconView,attribute: .bottom,multiplier: 1.0,constant: margin))
        addConstraint(NSLayoutConstraint(item: tipLabel,attribute: .width,relatedBy: .equal,toItem: nil,attribute: .notAnAttribute,multiplier: 1.0,constant: 236))
        
        // 4> 注册按钮
        addConstraint(NSLayoutConstraint(item: registerButton,attribute: .left,relatedBy: .equal,toItem: tipLabel,attribute: .left,multiplier: 1.0,constant: 0))
        addConstraint(NSLayoutConstraint(item: registerButton,attribute: .top,relatedBy: .equal,toItem: tipLabel,attribute: .bottom,multiplier: 1.0,constant: margin))
        addConstraint(NSLayoutConstraint(item: registerButton,attribute: .width,relatedBy: .equal,toItem: nil,attribute: .notAnAttribute,multiplier: 1.0,constant: 100))
        
        // 5> 登录按钮
        addConstraint(NSLayoutConstraint(item: loginButton,attribute: .right,relatedBy: .equal,toItem: tipLabel,attribute: .right,multiplier: 1.0,constant: 0))
        addConstraint(NSLayoutConstraint(item: loginButton,attribute: .top,relatedBy: .equal,toItem: tipLabel,attribute: .bottom,multiplier: 1.0,constant: margin))
        addConstraint(NSLayoutConstraint(item: loginButton,attribute: .width,relatedBy: .equal,toItem: registerButton,attribute: .width,multiplier: 1.0,constant: 0))
        
        // 6> 遮罩图像
        // views: 定义 VFL 中的控件名称和实际名称映射关系
        // metrics: 定义 VFL 中 () 指定的常数影射关系
        let viewDict=["maskIconView":maskIconView,"registerButton":registerButton] as[String:Any]
        let metrics = ["spacing": 20]
        
        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[maskIconView]-0-|",options: [],metrics: nil,views: viewDict))
        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-0-[maskIconView]-(spacing)-[registerButton]",options: [],metrics: metrics,views: viewDict))
        
    }
}
